/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.commons.net.ssh.util;

/**
 * A FriendlyChainer's motto is to prevent meaningless chaining, i.e.
 * 
 * <pre>
 * FriendlyChainer&lt;SomeException&gt; chainer = new FriendlyChainer&lt;SomeException&gt;()
 * {
 *     public SomeException chain(Throwable t)
 *     {
 *         if (t instanceof SomeException)
 *             return (SomeException) t;
 *         else
 *             return new SomeExcepion(t);
 *     }
 * };
 * </pre>
 * 
 * @param <Z>
 *            Throwable type
 */
public interface FriendlyChainer<Z extends Throwable>
{
    
    Z chain(Throwable t);
    
}